Lochinvar 50-210 Check flame signal, Review with owner, Cleaning boiler heat exchanger

Page 27

Service Manual

2Maintenance (continued)

Check flame signal

1.At high fire the flame signal shown on the display should be at least 10 microamps.

2.A lower flame signal may indicate a fouled or damaged flame sense electrode. If cleaning the flame sense electrode does not improve, ground wiring is in good condition, and ground continuity is satisfactory, replace the flame sense electrode.

3.See Section 3 - Troubleshooting in this manual for other procedures to deal with low flame signal.

Review with owner

1.Review the Knight Wall Mount User’s Information Manual with the owner.

2.Emphasize the need to perform the maintenance schedule specified in the Knight Wall Mount User’s Information Manual (and in this manual as well).

3.Remind the owner of the need to call a licensed contractor should the boiler or system exhibit any unusual behavior.

4.Remind the owner to follow the proper shutdown procedure and to schedule an annual start-up at the beginning of the next heating season.

Cleaning boiler heat exchanger

1.Shut down boiler:

•Follow the “To Turn Off Gas to Appliance” instructions for the boiler in the Knight Wall Mount Installation and Operation Manual.

•Do not drain the boiler unless it will be exposed to freezing temperatures. If using freeze prevention fluid in system, do not drain.

2.Allow time for the boiler to cool to room temperature if it has been firing.

3.Remove the blower assembly (gas air/arm) from the heat exchanger access cover. Set bolts aside.

4.Remove the nuts securing the heat exchanger access cover to the heat exchanger and set aside.

5.Remove the heat exchanger access cover, cover gasket(s) and chamber insulation assembly.

￿WARNING The boiler contains ceramic fiber materials. Use care when handling these

materials per instructions on page 3 of this manual. Failure to comply could result in severe personal injury.

6.Use a vacuum cleaner to remove any accumulation on the boiler heating surfaces. Do not use any solvent.

7.Finish cleaning using a clean cloth dampened with warm water.

8.Install access cover gasket, chamber insulation assembly and cover.

9.Secure nuts on the studs. DO NOT overtighten.

10.Re-install the blower assembly (gas air/arm) using the bolts set aside in Step 3.

11.Close isolation valves on piping to isolate boiler from system. Attach a hose to the boiler drain and flush boiler thoroughly with clean water by using purging valves to allow water to flow through the water make-up line to the boiler.

12.When the boiler has been flushed, restore boiler to operation.

13.Perform start-up and check-out procedures in the Knight Wall Mount Installation and Operation Manual.

Oiled bearing circulators

1.The circulator shipped with the Knight wall mount boiler is water-lubricated. No oiling is required.

2.Check other circulators in the system. Oil any circulators requiring oil, following circulator manufacturer’s instructions. Over-oiling will damage the circulator.

3.Replace the boiler front access cover.

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Contents Models 50 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler Troubleshooting What is in this manual?Service MaintenanceNear boiler piping ServiceKnight wall mount display Control inputs Smart Control ModuleControl outputs Sequence of operation General OperationHow the boiler operates How the control module operatesOUT 123.8F129 Sequence of operationBLR SH 41% Rate Display panel menu access Display panel parameter access Parameter table Temperature DataControl Circulation Service Viewable and changeable control parameters Temperature settingsFunctions DHW settingsOutdoor air reset Data loggingOutdoor air shutdown Shift reset curveMaximum SH set point Minimum SH set pointAnti-cycling Boiler cascade address Control modesSH controlling sensor SH sourceService Notification Cascade offsetCirculation pumps Maintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Check boiler relief valve Flue vent system and air pipingCheck water system Check expansion tankInspect ignition and flame sense electrodes Check ignition ground wiringCheck all boiler wiring Check control settingsOiled bearing circulators Check flame signalCleaning boiler heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does Not No DisplayNo Burner OperationTemperature Resistance Checking temperature sensorsDHW Pump NoisyNo Pump Boiler Pump System PumpSequence Switch/LWCOFlow FlameNo Flame Ign Anti-cyclingRunning No FlameFan Speed Low Auto ResetHigh Limit Fan LowSensor Shorted Fan HighFan Speed High Sensor OpenTemp O/Shoot Rem Ctrl Flt Parameters ProgrOpen Low 24 vac Service BlkWatch Dog Error No Error StoredGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or Obstruction2Gas Valve Adjustment Gas valve adjustment procedurePage

50-210 specifications

The Lochinvar 50-210 is a powerful and efficient boiler designed for residential and commercial heating applications. This model is a part of Lochinvar’s line of advanced heating solutions, known for their reliability, efficiency, and innovative technologies. The 50-210 offers a high thermal efficiency rating, ensuring that energy consumption is minimized while still providing excellent heating performance.

One of the standout features of the Lochinvar 50-210 boiler is its advanced control system. It is equipped with a user-friendly LCD display that allows easy access to system settings and real-time performance data. This technology enhances user experience, allowing for easy adjustments and monitoring, ensuring optimal performance based on specific heating needs.

The Lochinvar 50-210 is designed with a fully modulating burner, which means it can adjust its output to match the heating demand effectively. This feature not only provides superior comfort but also increases energy savings by preventing the boiler from running at full capacity when it's not necessary. Moreover, the modulating burner minimizes wear and tear, extending the lifespan of the unit.

In terms of safety, the Lochinvar 50-210 incorporates several features such as multiple temperature and pressure sensors, flame safeguard systems, and safety cut-off controls. These safeguard mechanisms ensure that the system operates safely and efficiently, providing peace of mind to users.

The construction of the Lochinvar 50-210 is robust, featuring high-grade stainless steel and a durable heat exchanger. This design helps resist corrosion, ensuring longevity and requiring minimal maintenance over the years. Additionally, its compact design allows for easier installation, making it suitable for various settings, even those with limited space.

Furthermore, the Lochinvar 50-210 operates quietly, which adds to its appeal for residential installations. Its environmental considerations are also noteworthy, with low emissions contributing to cleaner air quality.

Overall, the Lochinvar 50-210 is a sophisticated heating solution that blends efficiency, reliability, and advanced technology. With its user-friendly controls, modulating burner, safety features, and durable construction, it meets the heating demands of modern homes and commercial spaces, making it a top choice for those seeking dependable boiler performance.
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